Cut-off.



F. T. wEAvEm l. GUT-OFF.' APPLICATION FILED APi1.4.v19-l8;

1,294,003. i Patented-Teh. 11, 1919.

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FEED r. WEAVER, or EEACKVILLE, PENNSYLVANIA.

` CUT-OFF.

Specication of Letters Patent.

Patented lFeb. fil, ll9i9.

Application led April 4, 1918. Serial No. 226,774.

' character especially designed and adapted for use in connection with agas line and it is an object of the invention to provide a novel andimproved cut-oftl of Vthis type which is normally maintained in openposition under the influence of the pressure of the gas passing throughthe line and which automatically assumes a closed position upon droppingof the gas pressure.

It is also an object of the invention to provide a novel and improvedautomatic cutoff which is manually moved into open position and which ismaintained in such position through the medium of the pressure of the'gas flowing through the line.

Another object of the invention is to provide a novel and improveddevice of this general character including a valve chamber interposed inthepipe line and which chamber is provided with a port in communicationwith the atmosphere together with a swinging cut-off which automaticallyassumes a closed position upon a material decrease in the pressure ofthe gas flowing through the line and which cut-off shuts olf the How ofthe gas through the port when the cut-ofi' is f in open positiontogether with an automatically operating valve for closing the port whenthe cut-off is in closed position.

The invention consists in the details cf construction and in thecombination and arrangement of the several parts of my improved cut-offwhereby. certain important advantages are attained and thedevice'rendered simpler, less expensive and otherwise more convenientand advantageous 'for use,

as will be hereinafter more fully set forth.

The novel features of my invention will hereinafter be definitelyclaimed.

In order that my invention may be the better understood, I will nowproceed to describe the same with reference to the accompanyingdrawings, wherein:

Figure l is a longitudinal sectional view cover C held to the b vmember9.

- form and has its marginal Vpipe line L and which line leads from asuitable source cf gas supply and delivers to any desired location. Thesection 1 of the pipe line L leading from the box extends slightlywithinthe box and has its inner edge 2 arranged on a bevel. v

he box B includes the removable lid or ox in a conventional mannerthrough the medium of the screws 3 or the like and interposed betweenthe lid or cover C and the adjacent edge faces of the box B is a gasket4 whereby a hermetic closure -is assured with the lid or cover C. inapplied position.

Disposed transversely through the box B adjacent the discharging endthereof and in closeV proximity to the lid or cover C is a shaft 5having one end portion extending exteriorly of the box B and providedwith a ring 6 or the like whereby the shaft 5 may be manually rotatedwith convenience andl facility.

Arranged within the box B and loosely engaged with the shaft 5 are theextremities of a yoke 7 herein disclosed as substantially U-'shape inform and provided at substantially its center with an arm 8 extending ina direction away from the shaft minating in the enlarged eye or annularThe yoke 7 'and the arm 8 aiford a member substantially in the form of aY.

V denotes a valve or cut-oft1 formed preferably of rubber and havingembedded therein a reinforcing disk l() preferably of metal. The valveor cut-oil V is circular in or peripheral portion provided with thevoppositely directed flanges 11 formed of thin rubber and converging incross section whereby the valve or cut-ofi'l is substantially cup-shapeat opposite sides. When the valve or cut-oli V is in its elevated orraised positionone of the flanges 1]. contacts with the lid oreover C.The lid`l 5 and tery lits normal position or in Vobstruction orhindrance lthe end portion of the arm mation ofthe necessary suction formaintaining the valve or cut-on elevated under-` vthe influence of thepressure of the 'gas passing through the line L as suchV gas will have anatural tendency to escape through .the port'12. When the' pressure ofthe-gas within the line L materially decreases the valve or cut-off'willautomatically form and seat upon the end of the section 1 of theline L extended within the box B so that-upon the pressure ofthe gasreturning to normal, the gas can not iow from the box B. VBy this meansit'will be at once self-evident that no gas will Abe able to escapethrough the burners which may have been extinguished upon the droppingof the gas pressure.

Carried by the shaft 5 is' a rock 'arm 1/1 of atl-length to engage theintermediate or base portion 'of the yoke ingfthe requisite rotation totheshaft 5v the valve 'or cut-'olf V may be readily returned to contactwith the lid or 'cover C as illustrated in Fig. 1.

I iind it of advantage to have the arm 14 normally maintained in loweredposition so that the possibility of said arm offering any to thedropping of the valve or cut-off V'is avoided. For this 'reasonlI employthe spring 15 having one end portion engaged with the -arm 14 and itsopposite end portion contacting with the lid or cover C with theintermediate portion 16 of said spring coiled-about the shaft 5. As theyoke 7 is loosely engaged with the shaft 5 it will be understood thatthespring 15 may readily return the arm 14 to its normal positionwithout affecting the normal or raised position of the valve or cut-'oif"V.

Supported intermediate its vlength by the inner face of the lid or coverC is an arm 17 having one end portion provided with the pad 18 of rubberor kindred material and 'which' pad serves to close the port 12 when thevalve or cut-off V is in lowered position so that gas is prevented fromescape through the port 12after the gas pressure has been raised andbeforethe valve or cut-off V is againelevated. The support for the arm17 is' so positioned `as to' permit the weight of 17 at the side of the'support therefor remote from the pad 18 to automatically cause the pad18 to assume a closed position when the valve or cut-ofil V is lowered.This portion ofthe arm 17 isl also of such'a length as to be engaged bythe valve or cut-off V when raised so that the pad 18will be thrown into`an open position.

The pad 18`a'nd the arm'17 constitute a valve. It will also beunderstood that the box B affords a ,valve chamber.

From the foregoing description, it is it may h also be obvious that myinvention is suscep- 7 so that upon impart-- thought to be obvious thata cut-off constructed in accordance with my invention is particularlywell Aadapted for use by reason of the convenience and facility withwhich be assembled and operated and it will tible` of some change andmodification without departing from the principles and spirit thereofand for this reason I do not wish to be understood yas limiting myselfto the precise arrangement and formation ofthe Vseveral parts hereinshown in carrying out my invention in Vpractice except as hereinafterclaimed.

I claim: n a

1. In combination with `agas line, a box interposed therein, a wall ofsaid box being provided with a port, a swinging cut-olf mounted withinthe box and assuming a closed position upon dropping of pressure withinthe pipe line, means for moving the cut-ofi` into open position, in openposition being maintained by the gas pressure in contact with the wallof the box provided with the port, said cut-olf when in contactwith saidwall preventing flow of gas through they port, and means within the boxautomatically operating to close the port when the cut-olf is in closedposition.

2. In combination with a gas line, a box interposed therein, a wall ofsaid box being provided with a port, a swinging cut-off mounted withinthe box and assuminga closed position upon dropping of lpressure withinthe pipeline, means for moving the cut-ofi` into open` osition, saidvalve when in open 4position 'y eing maintained yby the gas pressure incontact with the wall of the box provided with the ort, said cut-olfwhen in contact `with sai'wall preventing iow of gas through the port,rand a, member automatically operating to close the port when thecut-off ,is in closed position.

3. In combination with'a gas line, a box interposed therein, a wallofsaid box bein provided with a port, a swinging cut-.c mounted withinthe box and assuming. a closed position upon dropping of pressure withinthe pipe line, means for movingthe cut-0H into open position, said valvewhen in open position being maintained by the `gas pressure in contactwith the wallof the said valve when member and preventing How from thebox when the cut-ofi is in closed position, and a rock arm carried bythe shaft and engageable with the member for moving the cutoff into openposition upon rotation of the shaft in one direction. s

5. In combination with a pipe line, a box interposed therein, a shaftdisposed through the box and provided with operating means, a memberloosely engaged with the shaft for swinging movement, a cut-off carriedby the member and preventing flow from the box when the cut-ofi'l is inclosed position, a rock-arm carried by the shaft and engageable with themember for movi the cutofi' into open position upon rotation of theshaft in one direction, and means for automatically moving the shaft inthe opposite direction.

6. In combination with a gas line, a box interposed therein,

a wall of said box being provided with a port, a swinging cut-oli'mounted within the box and assuming a closed position upon dropping ofpressure within the pipe line, means for moving the cut-off into openposition, said valve when in open position being maintained by the aspressure in contact with the wall of the ox provided with the port, saidcut-ofi when in contact with said wall preventing flow of gas throughthe port, and means automatically o erating to close the port when thecut-ofi'D is in closed position, said cut-off when in contact with thewall provided with the port adjusting said last named means into openposition relative to the port.

7. In combination with a gas line, a box interposed therein, a wall ofsaid box being provided with a ort, a swinging cut-01T mounted within te box and assuming a closed position upon dropping of pressure Copies ofthis patent may be obtained for ve cents each, by

within the pipe line, means for moving the cut-oif into open position,said valve when in open position being maintained by the gas pressure incontact with the wall of the box provided with the port, said cut-oli'when in contact with said wall preventing flow of gas through the port,an arm positioned within the box and supported for swinging movement bythe wall of the box provided with a port, an end portion of the armclosing the port when the cut-off is in closed position, said cut-oiicontacting with the arm when in open position to open the port.

8. In combination with a gas line, a box interposed therein, a wall ofsaid box bein provided ,with a port, a swinging cut-o mounted within thebox and assuming a closed position upon dropping of pressure within thepipe line, means for moving the cutofi1 into open position, said valvewhen in open position being maintained by the gas pressure in contactwith the wall of the box provided with the port, said cut-off when incontact with said wall preventing flow of gas through the port, an armpositioned within the box and supported for swinging movement by thewall of the box provided with a port, an end portion of the arm closingthe port when the cut-oii' is in closed position,said cut-oli"contacting with the arm when in open position to open the port, said armmoving by gravity to close the port.

In testimony whereof I hereunto affix my signature in the presence oftwo witnesses.

FRED T. WEAVER.

Witnesses:

JOSEPH Corn, S. T. PURNELL.

addressing the Commissioner of Patents,

Washington, '.D. C.

